Siphon structure for use in water-closets.



J. MADDOCK.

SIPHON STRUCTURE FOR USE IN WATER CLOSETS.

APPLICATION FILED SEPT. 11. I916.

Lfi fi fi o menm May 8, 1917.

UNITED TATlil PATENT OFFKQEO JOHN MADDOOK, OF TRENTON, NEW JERSEY, ASSIGNOR TO JOHN MADDOCK & SONS, OF TRENTON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

SIPHON STRUCTURE FOR USE IN WATER-CLOSETS.

Specification of Letters Patent.

Patented May 8, will,

Application filed September 11, 1916. Serial No. 119,577.

To all whom it may concern Be it known that I, JOHN MADnocK, a citizen of the United-States of America, residing. at Trenton, county of Mercer, State of New Jersey, have invented certain new and useful Improvements in Siphon Structures for Use in Water-Closets, of which the following is a specification.

My invention relates to siphon water closets and comprises certain modifications in the contour of the walls of the lower portion of the down-leg of the siphon which greatly enhance the promptness and continuity of the siphonic action produced when the 010st is flushed. In some aspects the present invention constitutes an improvement on that shown in my prior Patent No. 897,118.

While my invention may without substantial modification be applied to all types of siphon closet, whether employing a yet or not, I have here illustrated in the accompanying sheet of drawmgs only one embodiment of said invention, to wit, as it appears in the type known as a straightsiphon or plain siphon water closet. In said drawings,

Figure 1 is a perspective view of a half section of the closet taken on a vertical sectional plane, and

Fig. 2 is a partial detail cross section on line 2-2 of Fig. 1, parts being broken away.

Throughoutthc drawings like reference characters indicate like parts. 1, is the bowl of the water closet, which is vented through the lip-leg 2, of the usual siphon passage way over the flat dam 3, through siphon down-leg 4c, outlet opening 5, and outlet passage 5. At the bottom of down-leg 4;, is the splash surface 6, such as is usually provided in some form or other in standard makes of siphon closets.

The particular feature of improvement which constitutes my present invention is a lateral enlargement of the bore of the downleg of the closet at and adjacent to the juncture of said down lepr 4, with the splash surface 6. In the straight siphon type oi closet leg bore is composed of the cavities or swellings 8, 8, on either side, and 7, at the rear of the down-leg, these together extending around the remaining three sides of the bore of the down-leg at and adjacent to the juncture of said down-lop, with the splash surface 6, or nearly all the way around the said side and rear walls.

In operation I find that in structures cmhodying this improvement the siphonic action begins more promptly, continues more evenly and strongly, and lasts until the bowl is more nearly emptied when the closet is flushed with a given amount or rate of flow of flushing Water, than is the case with other standard siphon closets having the same dimensions exclusive of this lateral enlargement-of the down-leg bore. While it is difficult to determine or demonstrate the exact principle of operation which produces this improved result my present theory is that the falling water striking the splash surface 6, has opportunity for deflection in all directions, 6. into the enlargements 7, and 8, as the result of my improved construction, as well as toward the outlet opening 5, and that the bodies of water entering said enlargement are then forced upward and back again toward the center of the downleg bore by the curvature of the walls, thus forming a multiplicity of cross currents at the base of the down-leg of the siphon which create an interference with the downward and outward course of the main stream passing through the siphon as soon as the water begins to pour over dam 3. Any such checking of the flow out from the bottom of the down-leg assists in the formation of what is KHOWH as the water plug at that point and so hastens the initiation and facilitates the maintenance of siphonic action which, as is well known, occurs only after such a water plug is formed as will substantially fill the lower outlet oi the down-leg, or otherwise seal the same against rentrance o'i air once expelled by the ejector action of th water pouring over the dam into said down leg. Whenever the air pressure at the dam on the water in the up-leg 9;, of the siphon is thus reduced below atmospheric tension suf ficiently to leave unbalanced the pressure of air on the surface of the water remaining in the bowl, the said water is forced down out of the bowl, up through the siphon 1119+ leg with a rush and the flushing of the closet is successfully completed.

This is the Well known and generally understood principle of action of a siphon water closet and the said action is, in my opinion, facilitated by the action of the enlargements 7 and 8 in that they assist in holding the Water at the base of the down leg and in the formation of the Water plug resulting therefrom.

It is to be understood that the particular form and location of the outlet opening 5, shown 'in the attached drawing Which illustrates one embodiment of my invention,

' might be varied Without departing from the principle of the invention so lon as the described general form and functions of the cavities or swellings 7 and 8 are preserved.

Having, therefore, described my invention, I claim:

1. A siphon structure for use in Water closets having at the bottom of the down leg a horizontal splash surface, and a lateral enlargement extending around three sides of the bore of the down-leg at and adjacent to the juncture of said down leg with said splash surface.

2. A siphon structure for use in Water closets having at the bottom of the downleg a horizontal splash surface, a horizontally extending outlet and a lateral enlargement extending around. the remaining three sides of the bore of the down-leg at and ad jacent to the juncture of said down-leg With said splash surface.

JOHN MADDOGK. 

